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4179 Toutatis (1989 AC)

Classification: Apollo [NEO, PHA] SPK-ID: 2004179

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 510 (heliocentric ecliptic J2000)

Element	Value	Uncertainty (1-sigma)	Units
e	.6260902638847483	1.4054e-09
a	2.543228263903637	4.7197e-10	au
q	.9509378090370587	3.728e-09	au
i	.4477992419778091	1.8936e-07	deg
node	125.1852584731468	2.4263e-05	deg
peri	278.0810743695068	2.3769e-05	deg
M	214.2215089174523	1.867e-07	deg
t_p	2459200.384152226790 (2020-Dec-16.88415223)	9.3371e-07	TDB
period	1481.413980882523 4.06	4.1238e-07 1.129e-09	d yr
n	.2430110722902298	6.7647e-11	deg/d
Q	4.135518718770216	7.6747e-10	au

Additional Model Parameters

Parameter	Value	Uncertainty (1-sigma)
A1 [EST]	-4.067158491580039E-13	9.314E-14
A2 [EST]	-6.306342978745202E-15	1.042E-15

Orbit Determination Parameters

# obs. used (total)	6102
# delay obs. used	35
# Doppler obs. used	28
data-arc span	31191 days (85.40 yr)
first obs. used	1934-02-10
last obs. used	2019-07-05
planetary ephem.	DE431
SB-pert. ephem.	SB431-N16
condition code	0
norm. resid. RMS	.26584
source	ORB
producer	Otto Matic
solution date	2019-Aug-09 07:02:57

Additional Information

Earth MOID = .00640764 au

Jupiter MOID = 1.28596 au

T_jup = 3.136

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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table

Parameter	Symbol	Value	Units	Sigma	Reference	Notes
absolute magnitude	H	15.2		n/a	MPO473823
magnitude slope	G	0.10		n/a	PDS3 (MPC 28111)	Fit
diameter	diameter	5.4	km	n/a	Hazards due to Comets and Asteroids (1994), Ed. T. Gehrels, pp.540-543	based on assumed medium albedo (0.15)
extent	extent	1.70x2.03x4.26	km	0.08	Hudson et al. (2003) Icarus 161:346-355	dynamically equivalent, equal volume ellipsoid
rotation period	rot_per	176.	h	n/a	LCDB (Rev. 2019-January); Warner et al., 2009	Published Reference List: [Nakamura, T.; Fuse, T. (1998) Pub. Astron. Soc. Japan 50, 531-536.] [Pravec, P.; et al. (2005) Icarus 173, 108-131.]
geometric albedo	albedo	0.405		0.137	urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)
SMASSII spectral type	spec_B	Sk		n/a	EAR-A-5-DDR-TAXONOMY-V4.0	based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4179 Toutatis (1989 AC) Discovered 1989-Jan-04 by Pollas, C. at Caussols
Reference: DISCOVERY.DB	Last Updated: 2003-08-29

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Alternate Designations

1989 AC = 1934 CT

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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